A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 155 is composite.
155 is not a prime number, but a composite number, as it is divisible by 5 and 31.
155 is not a prime number, so it can't be a prime factor.
As 155 is ending with 5 then it can be divided by 5 thus it's not a prime number 155 = 5 x 31
It is: 5*31 = 155
A prime number is a number that is evenly divisible only by itself or 1.155 can be evenly divided by 5 (155/5=31), so is not a prime number.
155 is a composite number. Its factors are 1, 5, 31, and 155.
not prime, since it is divideable by 5, and 31.
It has morethan two factors.
155 five is composite. It is composite because it has 5 as a factor. The only number that can be neither prime nor composite is 1.
The prime factorization of 155 is 5 * 315x31
155 is not a prime number, hint: Any number ending in a 5 is divisible by 5.155 is a composite number
Prime factors of 155 are 5 and 31